"The Bugs Bunny/Roadrunner Show" (1978-85)
"Spider-Man and his Amazing Friends" (1981-1986)
"Kidd Video" (1984-1987)
"Thundarr the Barbarian" (1980-1984)
I vaguely remember the theme song to "The Get-along Gang", but when I looked it up on the IMDb just now, I discovered that that show starred Donovan Freberg, whom some of you may remember as the "annoying Encyclopedia Brittanica kid" from the 80's. He is also the son of famed parodist Stan Freberg.
90's Ninja Turtles (man I breathed this stuff when I was a kid)
80's The Real Ghostbusters (see above, it was a fantastic cartoon that didn't patronise kids)
Captain Planet
90's Inspector Gadget (new ones, movie and Gadget Boy SUCK!)
90's Spiderman
All of the above are the original versions - all the modern updates suck!